Answer:
Differences are given below.
Explanation:
The main difference in the human and mouse skin is the number of layers i e. human skin have 6 to 10 layers of epidermis while mouse has only 3 layers. Worm has 302 neurons in its nervous system as compared to the 86 billion neurons present in human body because of difference in size. the main difference in human and fly muscles is that fly has strong muscle responsible for flight in the air while human has no flight muscles. The main difference of human and frog blood is the red blood cells. human has RBC with no nucleus while frog has red blood cells having nucleus.
ANSWER: C, the continents were at one time joined together.
REASONING: Alfred Wegener was the first person to propose the scientific theory of Continental Drift. Continental Drift is a theory that supposes all the continents were at one time joined together as one large land mass. The mechanisms of continental drift can be explained by Plate Tectonics.
Question options found from another source:
a. The different cells in an organism contain different genes
b. Each cell in an organism transcribes only the genes that the cell needs to perform its functions
c. Each cell in the organism produces the same proteins, but the ones that aren't needed are immediately digested
d. The different cells in an organism all transcribe the same genes, but their ribosomes make different proteins from them
Answer:
b. Each cell in an organism transcribes only the genes that the cell needs to perform its functions
Explanation:
Every cell in an organism contains exactly the same DNA, but it is how that DNA is put to use that affects the identity of the cell.
In a nerve cell and a liver cell the DNA is the same, but the expression of different genes, and therefore the combination of proteins present, will be hugely different.
This is because different combinations of genes are transcribed in different cell types that make one cell function as a liver cell and one as a nerve cell. These genes are cell-type specific. For example, a liver cell might express enzymes important for the breakdown of toxins, whereas a nerve cell might produce proteins important for signalling.